Disable input devices in Linux

cat_mode.sh

#!/bin/bash
#
# Shell script to disable (and reenable) the keyboard and the touchpad.
# I use it when cats are around and I can work with a wireless keyboard/mouse.
# To use it, execute "xinput list" to print the list of input devices and add 
# the id and the master it belongs (number in parenthesis) to the id and 
# master arrays.
# "./cat_mode.sh [on]" disables the configured devices
# "./cat_mode.sh off" (off or anything else) reenables the devices
#

id=(6 15 16)
master=(3 3 2)
idLength=${#id[@]}

if [ $# -eq 1 ]; then
        input=$1
else
        input="on"
fi

if [ "$input" = "on" ]; then
        for (( i=0; i<${idLength}; i++ ));
        do
                xinput float ${id[$i]}
        done
else
        for (( i=0; i<${idLength}; i++ ));
        do
                xinput reattach ${id[$i]} ${master[$i]}
        done
fi